Guide strip



Jan. 1, 1929. 1,697,625

R. c. ZANNOTH GUIDE STRIP Filed Jan. 26, 1928 INVENTOR. E0552?! 5.ZZINNZ77H BY tlllllllllllll'llllllllllllll I I w\lllllllllllllllllllllllllll 1 ATTORNEY. A]

Patented Jan. 1, 1929.

PATENT OFFICE. I

-UNITED STATES ROBERT C. ZANNOTH, OF MILWAUKEE, WISCONSIN.

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Application filed January 26, 1928. Serial No. 249,563.

This invention relates to guide and divider strips for concrete floors,walls, or ceihngs particularly of the terrazzo or terrazzo mosaic type.

Terrazzo floors ordinarily comprise a lower a of cleavage for relievinginternal stresses caused'by settling, shrinking, or general distortion,and sometimes of curved or other irregular contours intermeshing to formdesigns of various configurations. The strips are ordinarily pressededgewise into interlocking relation with the lower layer (while the sameis still green) leaving exposed marginal portions projecting outwardlyfrom the surface of the lower layer, a distance substantially equal tothe depth of the top layer which is thereafter applied.

Strips heretofore designed for this purpose have ordinarily includedsubstantially horizontal wing portions arranged to abut the top face ofthe lower layer to provide positive stops for limiting the depression ofthe strips into that layer. Such wings were heretofore deemed necessaryin order that the strips may serve as an accurate depth gauge for the.top

I layer. In the finished floor however they lie within the plane ofunion between the two layers and exert a prying action therebetweentending to loosen and separate the layers.

I An object of the present invention is the provision of an improvedguide and divid ng strip of simple and economical design WhlCh is freefrom the above objection and otherwise entirely satisfactory for thepurposes I mentioned.

d Other more specific objects and advantages will appear from thefollowing description of two illustrative embodiments of the pres-,

ent invention.

Inthe accompanying drawings Figure 1 is a perspective view of a portionof a ide strip constructed in accordance with t e present invention.

Fig. 2 is a top plan view.

Fig. 3 is an enlarged sectional view on the line 3-3 of Figure 1,showing the strip in position within a terrazzo floor.

Fig. 4 is a side elevation of a guide strip of. modified form.

Fig. 5 is an enlarged sectional view on the line 55 of Figure 4. r

The strip shown'in Figures 1 to 3 is of flexible material, preferablybrass, the upper portion 10 thereof being unbroken so as to provide animpenetrable divider for the top layer a of the floor. The upper edge-11of the strip is substantially straight and is intended to lie flush withthe exposed surface of the floor, as indicated in Figure 3. The lowerportion 12 of the strip is deformed in order to provide a secureanchorage within the lower layer b,

and to form a gauge for cooperation with the top surface of the lowerlayer to determine the proper elevation of the upper edge 11 of thestrip. To this end a series of longitudinal bars 13 are pressed out ofthe body of the strip immediately below the top portion 10 thereof. Theupper edges 14 of these bars lie I in a common plane parallel withtheupper edge 11 of the strip and at a distance therefrom e ual to thedepth of the top layer a of the oor. These bars are preferably of archedform, as clearly indicated in Figure '2, and the several bars of aseries preferably rojct alternately in opposite directions rom the planeof the strip. A second series of-longitudinal bars 15 are also pressedout of the body of the strip, each bar 15 being disposed immediatelybelow and co-extensive with a bar 13. Each pair of contiguous bars 13and 15 pro'e'ct in opposite directions from the plane of t e strip sothat the top edge 16 of each lower bar 15 is well spaced from the loweredge 17 of the associated bar 13 to permit an easy flow of the floormaterial therebetween. The lower series of bars 15 are also preferablyof arched form and extend downwardly to and including the lower edge -18of the strip. These bent portions occurring at intervals in the loweredge.18 of the strip increase the base area of the strip and thus serveto sustain the strip in the upright portion shown in Figure 3.

In laying the floor the lower layer 6 of appropriate thickness is firstapplied to the still green, the strip is pressed edgewise thereintountil the top edges 14 of the bars 13 are .flush with the top surface ofthe layer 6.

Ordinarily the thicknessof the layer 6 is such that when the strip is inthis position it rests upon the foundation layer 0, although this is notinvariably the case. As the strip is thus inserted into the layer b thematerial thereof flows over the top edges 16 of the bars 15 to securelylock the strip against rising. After the strips have been thuspositioned the top layer a is applied, the upper edge 11 of the stripserving as a gauge for the top surface thereof.

The strip shown in Figures 4 and 5 is similar in many respects to thathereinabove described. The upper portion 10' thereof is unbroken andterminates in a substantially straight upper edge 11. A series oflongitudinal bars, one of which is shown at 13, are

pressed laterally out of the strip immediately below the upper portion10, each bar having an upper edge 14 disposed within a plane parallelwith edge 11' and at a distance therefrom equal to the depth of the toplayer of the floor. A second series of similar bars, one of which isshown at 15', are pressed laterally in the o posite direction out of thestrip, immediate below the bars 13 and coextensive therewit Each bar 15is adapted to be embedded within the lower layer of the floor, in themanner hereinafter described, to pro vide a secure anchorage therewith,In these respectsthis strip is similar to the one first hereinabovedescribed. It will be noted however that the bars 13 and 15 are somewhatnarrower than the corresponding bars 13 and 15 of the first describedstrip and that each of the lower bars 15' are spaced from the lower edge18 so as to leave a substantially straight bar 19 therebetween. Theupper edge 20 of each bar 19 is well below the top of the lower layer ofthe floor,'so as to form an additional anchorage for the bar. In fact ininserting the strip edgewise into the lower layer of the floor the loweredges of the bars 13 .and 1 5 tend to forcethe material of the lowerlayer over the edge-20 so as to completely embed the same.

Various changes may be made in the embodiment of the inventionhereinabove described without departing from or sacrificing any of theadvantages of the invention as .de-

extending bars pressed laterally out of said strip, the upper edges ofsaid last named bars being lower than the upper edges of said firstnamed bars to permit embedding thereof in a lower layer and therebyprovide a firm anchorage for said strip.

2. A laterally flexible guide strip for use in multi-layer cementstructures, said strip having a substantially straight upper edge, aseries of longitudinally extending bars pressed laterally out of saidstrip, said bars being uniformly spaced from said upper edge to providea gauge for marking the union between successive layers, and a secondseries of bars pressed out of said strip, the upper edges of said lastnamed bars being disposed below the upper edges of said first named barsto permit embedding thereof in a lower layer and. thereby provide a firmanchorage for said strip. Y

3. A laterally flexible guide strip for use in multi-layer cementstructures, said strip having a substantially straight upper edge, aseries of longitudinally extending bars pressed laterally out of saidstrip and uniformly spaced from said upper edge to provide a gauge formarking the union between successive layers, and a second series oflongitudinally extending bars pressed laterally out of said strip belowsaid first mentioned bars to permit embedding thereof in a lower layerand thereby provide a firm anchorage for said strip.

4.'-A laterally flexible guide strip for the purposes mentloned having asubstantiall straight upper edge, a series of longitudina ly arched barspressed laterally out of said strip below said luppertedge and extendingsubstantially parallel'thereto, and a second series of longitudinallyarched bars pressed laterally in t strip below said rst named bars.

5. A laterally flexible guide strip for the purposes mentioned having asubstantially straight upper edge, a series of longitudinally archedbars pressed laterally out of said strip below said upper edge andextending substantially arallel thereto, and a second series oflongltudinally arched'bars pressed laterally out of said strip belowsaid first named series, each bar of said second series being contiguousto, coextensive With, and projecting oppositely with respect to a bar ofsaid first named series. v a

6. A laterally flexible guide strip for th pressed laterally out of-saidstrip intermediate and parallel with the upper and lower edges thereof,and a second series of bars pressed laterally out of said strip belowsaid e op osite direction out of said.

I vpurposes mentioned havlng a series of bars first named series, saidlast named bars extending into and including the lower edge of saidstrip.

7. A laterally flexible guide strip for the purposes mentioned havingsubstantially straight upper and lower edges, :1 series of bars beingcontiguous to, coextensive with, I bars pressed laterally out of saidstrip interand projecting oppositely with respect to a mediate andparallel with said upper and bar of said first named series. 10'

lower edges and, a second series of similar In witness whereof Ihereunto subscribe 6 bars pressed laterally out of said strip bemy namethis 23d day of January, 1928.

' tween said first named series and the lower edge of said strip, eachof said last named ROBERT C. ZANNOTH.

